Leaving aside the fact that it is really hard to judge and distinguish between "nowhere" and "somewhere", is there any evidence that a significant number smart

Leaving aside the fact that it is really hard to judge and distinguish between "nowhere" and "somewhere", is there any evidence that a significant number smart folks go nowhere? More than 20%? More than 50%? 80%? 90%? In my experience (anecdotal), smart people tend to share two distinct features: they are lazy and they are effective. They are only as lazy as being effective allows them to be. By effective I mean that they attain their desired outcomes. In short, most smart people go where they want to go.